1. Steel grid structure form:
The grid is divided into flat plate grid and special-shaped grid, and the flat grid generally includes: positive quadrangular pyramid grid, oblique quadrangular pyramid grid, evacuated quadrangular pyramid grid, flat triangular pyramid grid, etc., and special-shaped grid generally includes: single-layer spherical shell grid, double-layer spherical shell grid, double-layer cylindrical shell grid, oblique triangular pyramid grid, etc.
2. Support conditions.
According to the support conditions of the grid, the grid is divided into upper chord support and lower chord support. It is also divided into single-layer grid and multi-layer grid, with column point support and surrounding ring beam support.
3. Grid node classification.
The grid is generally divided into bolt ball node grid, welded ball node grid, and plate node grid. In the large-span space structure, the bolt ball node grid and the welded ball node grid are usually mixed.
4. Roof drainage slope.
The drainage of the grid roof is generally divided into centralized drainage and free falling, and the slope of drainage is generally divided into structural slope finding and supporting slope, the structure slope is designed according to the needs of the building, and the slope of the drainage is designed by using the structure of the grid itself, and the slope of the supporting slope is found according to the slope of the building by using the auxiliary components of the grid.
5. Disturbance. The disturbance degree of the grid is an important basis for detecting the construction quality of the grid, and the disturbance degree of the grid refers to the difference between the design elevation of a certain node after the installation of the grid, and the measurement of the grid deflection is divided into two times, no load and full load, and the quality of the grid construction is tested and analyzed by comparing the two data.
6. Yagao. The vector height of the grid is the height between the upper and lower chords of the grid structure.
7. Small assembly unit.
In the process of grid installation, the smallest installation unit except for the loose parts is generally divided into two parts: plane truss and cone.
8. Spelling unit.
In the process of grid installation, the installation unit composed of parts or small units is generally divided into two types: strip and block.
9. a node. The nodes of the grid are generally divided into three types: bolt ball nodes, welded ball nodes, and welded plate nodes.
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